.header{
    line-height: 60px; 
    color: #393d49; 
    font-size: 40px;
    font-family: 楷体;
}
.content {
    height: auto;
    float: right;
    width: 800px;
    line-height: 25px;
    /*color: #f6f6f6;*/
    margin: 0 auto;
    margin-right: 100px;
    margin-bottom: 100px;
    overflow-x:auto;
}